<template>

<!--  <li onmouseenter="" onmouseleave="" onmouseover="" onmouseout="">-->

  <li @mouseenter="handleEnter(true)" @mouseleave="handleEnter(false)" :style="{background: bgColor}">
    <label>
      <input type="checkbox" v-model="todo.complete"/>
      <span>{{todo.title}}</span>
    </label>
    <button class="btn btn-danger" v-show="isShow" @click="deleteItem">删除</button>
  </li>
</template>

<script>
  import PubSub from 'pubsub-js'
    export default {
        name: "TodoItem",
      props: {
          todo: Object,
          index: Number,
      },
      data(){
          return{
            bgColor: 'white', //默认的背景颜色
            isShow: false   //按钮默认是否显示
          }
      },
      methods: {
        handleEnter(isEnter){
          if (isEnter){
              this.bgColor = '#aaaaaa';
              this.isShow = true;
          }else {
            this.bgColor = 'white';
            this.isShow = false;
          }

        },
        deleteItem() {
          const {todo, index, deleteTodo} = this;
          if (window.confirm(`确认删除${todo.title}吗？`)) {
            // deleteTodo(index);

            //发布消息
            PubSub.publish('deleteTodo', index);
          }
        }
      }
    }
</script>

<style scoped>
  /*item*/
  li {
    list-style: none;
    height: 36px;
    line-height: 36px;
    padding: 0 5px;
    border-bottom: 1px solid #ddd;
  }

  li label {
    float: left;
    cursor: pointer;
  }

  li label li input {
    vertical-align: middle;
    margin-right: 6px;
    position: relative;
    top: -1px;
  }

  li button {
    float: right;
    /*display: none;*/
    margin-top: 3px;
  }

  li:before {
    content: initial;
  }

  li:last-child {
    border-bottom: none;
  }
</style>
